摘要
建立了回转窑实验装置,通过冷态实验研究了回转窑转速、倾角、内径、窑尾挡料圈高度等操作参数和结构参数对物料停留时间的影响。结果表明,物料在回转窑内的停留时间分布近似正态分布;物料停留时间随着回转窑转速、倾角和内径的增大而缩短;窑尾挡料圈高度对物料停留时间影响较复杂,转速小于2.5 r/min时,窑尾挡料圈高度的增加使物料停留时间延长,而当转速大于2.5 r/min时,窑尾挡料圈高度的增加反而使物料停留时间缩短;在某一固定回转窑倾角时,物料停留时间与物料质量流率的乘积与单位转速内物料质量流率近似成线性关系。
The main factors such as rotation speed, angle of inclination, kiln inner diameter, inlet-dam influencing the mean residence time of solids are presented on the experiment equipment which was established in the laboratory. The results indicate that the residence time of solids follows normal distribution and the mean residence time of solids declines along with rotation speed, angle of inclination or kiln inner diameter increasing. However, the effect of dam height on the mean residence time is more complex. As rotation speed is lower than 2.5 r/min, the mean residence time increases with the increasing of dam height, while decreasing with the increasing of dam height as rotation speed is higher than 2.5 r/min. The product of mean residence time and mass flow rate of solids increases approximately linearly with mass flow rate per unit rotation speed at a certain angle of inclination.
出处
《中国冶金》
CAS
2009年第3期24-27,共4页
China Metallurgy
基金
国家科技支撑计划课题资助项目(2006BAB12B04)
关键词
回转窑
操作参数
结构参数
停留时间
rotary kiln
operational parameters
structural parameters
residence time
